Journals / JRM / Vol.7, No.5


    Water-Based Processing of Fiberboard of Acrylic Resin Composites Reinforced With Cellulose Wood Pulp and Cellulose Nanofibrils

    Emanoele Maria Santos Chiromito1, Eliane Trovatti2, Antonio Jose Felix Carvalho1,*
    Journal of Renewable Materials, Vol.7, No.5, pp. 403-413, 2019, DOI:10.32604/jrm.2019.01846
    Abstract Despite the great potential of cellulose wood pulp and cellulose nanofibrils as reinforcing filler in thermoplastics, its use is limited due to its tendency to form agglomerates and due to its high hydrophilic character. Here we describe fiberboard composites with high contents of wood pulp or cellulose nanofibrils, and a resin of poly (styrene-methyl-methacrylate-acrylic acid) used as water-based emulsion. Cellulose wood pulp and cellulose nanofibrils were used directly in the form of water suspensions. The method is based on the flocculation of the polymer emulsion followed by agglomeration of a mixture of the polymer emulsion and cellulose suspension, leading to… More >


    Performance Comparison of Chemically Modified Sugarcane Bagasse for Removing Cd(II) in Water Environment

    Manh Khai Nguyen1,*, Minh Trang Hoang1,2, Thi Thuy Pham1, Bart Van der Bruggen2
    Journal of Renewable Materials, Vol.7, No.5, pp. 415-428, 2019, DOI:10.32604/jrm.2019.04371
    Abstract This paper evaluates the adsorption capacity of chemically sugarcane bagasses with sodium hydroxide (SHS), citric acid (CAS), tartaric acid (TAS) and unmodified sugarcane bagasse (SB) for cadmium adsorption in water environment. The results prove adsorption capacity for Cd (II) increases after chemical modification and the adsorption fits perfectly with the Langmuir isotherm. CAS had the highest maximum adsorption capacity of 45.45 mg/g followed by TAS with 38.46 mg/g and SHS with 29.41 at optimum pH 5.0 and 120 minutes equilibrium time while 1 g SB removed 18.8 mg Cd (II) in the same conditions. The kinetics study of the process… More >


    Mapping of the Brazilian Groups Studying Nanocellulose

    Asaph Armando Jacinto*, Márcia Aparecida da Silva Spinacé*
    Journal of Renewable Materials, Vol.7, No.5, pp. 429-440, 2019, DOI:10.32604/jrm.2019.04427
    Abstract The nanocellulose is a material that has gained much attention in the recent years. So, the relevance of Brazil in this field was evaluated concerning the scientific publications in Web of Science. Next, the Brazilian groups were mapped using a bibliometric procedure on these data. Then, more factors were analyzed from them too. They were the sources to extract the nanocellulose in Brazil, the methods to do it, the characterizations to determine its dimensions and the funding agencies of these researches. The results identified 69 Brazilian groups. Besides, the bacterial cellulose was the most common source. While the acid hydrolysis… More >


    Leaves Based Lubricant Additive Towards Improving Tribological Properties

    Xin Feng, Yichao Hu, Zhengfeng Cao, Yanqiu Xia*
    Journal of Renewable Materials, Vol.7, No.5, pp. 441-449, 2019, DOI:10.32604/jrm.2019.04881
    Abstract Three kinds of crop leaf-surface waxes were extracted from wheat, corn and broomcorn leaves, respectively. The crop leaf-surface waxes as lubricant additives were added to synthetic ester and the friction and wear properties of prepared lubricants for steel-aluminum and steel-copper friction pair were investigated in detail. The scanning electron microscopy (SEM) and secondary ion mass spectrometry (SIMS) were employed to explore the friction mechanisms. The results show that crop leaf-surface waxes could successfully reduce the friction and wear of steel-aluminum and steel-copper sliding friction pairs as compared with pure synthetic ester. For example, when the concentration of wheat leaf-surface wax… More >


    Application of Modern Wood Product Glulam in Timber Frame With Tenon-Mortise Joints and Its Structural Behavior

    Guofang Wu, Yong Zhong, Yingchun Gong, Haiqing Ren*
    Journal of Renewable Materials, Vol.7, No.5, pp. 451-461, 2019, DOI:10.32604/jrm.2019.06229
    Abstract Tenon-mortise joint is widely used in traditional timber structures around the world. This paper summarizes the results of an experimental study of the structural behavior of tenon-mortise joints made with glulam and CNC technology instead of traditional material and manual work. 30 full-scale tenon-mortise joints were manufactured and tested under monotonic loading, and the effects of dimension, shape, processing error and adhesive were evaluated. It was found that the round rectangular shaped tenon-mortise joints were comparable with traditional joints in terms of structural performance, but were time and labor saving. The variability of the proposed tenon-mortise joints was lower, which… More >


    Blend of Polyhydroxyalkanoates Synthesized By Lipase Positive Bacteria From Plant Oils

    Nasir Javaid, Rida Batool, Nazia Jamil*
    Journal of Renewable Materials, Vol.7, No.5, pp. 463-476, 2019, DOI:10.32604/jrm.2019.00023
    Abstract A total of 5 biochemically characterized lipase positive bacterial strains were screened for Polyhydroxyalkanoates (PHA) production by Nile blue staining and confirmation was done by Sudan Black B. PHA production ability for all strains was optimized followed by time profiling calculation and comparison via using glucose and two plant oils i.e., canola and mustard oil. Quantitative analysis showed that glucose can serve as a carbon source for maximum biomass (2.5 g/L CDW for strain 5) and PHA production (70.3% for strain 2). PHA produced by strain 2 was further analyzed for its chemical composition and type via Fourier Transform Infrared… More >


    Tannin-Based Biofoams-A Review

    Antonio Pizzi*
    Journal of Renewable Materials, Vol.7, No.5, pp. 477-492, 2019, DOI:10.32604/jrm.2019.06511
    Abstract This review details the development of tannin-based biofoams for fire resistance and acoustic insulation and details the different varieties of these foams that have been developed, from tannin-furanic self-blowing foams to tannin-furanic polyurethanes and finally non-isocyanate tannin-based-carbohydrates polyurethanes (NIPU). More >


    Characterization of Bacterial Cellulose From Oil Palm Shoot Juices and Coconut Juice/Poly(ethylene glycol) Biocomposite

    Nantharat Phruksaphithak1,*, Chalermkiet Kaewnun2, Sompong O-Thong2
    Journal of Renewable Materials, Vol.7, No.5, pp. 493-504, 2019, DOI:10.32604/jrm.2019.00020
    Abstract A new biocomposite was preformed between bacterial cellulose (BC) pellicle and polyethylene glycol (PEG) at different concentrations (0%, 5, 10%, 15% and 20%) and different molecular weight (600, 1000 and 2000). The structure and mechanical properties of BC/PEG biocomposite were investigated. The results indicated that the properties of the BC were improved by the addition of PEG. The morphology of the BC and BC/PEG blend was examined by a scanning electron microscope (SEM). These showed that PEG was coated with a large pore size fibril on the BC and the BC/PEG was dense with an even and smooth surface. All… More >

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